Question

Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A): Enthalpy of neutralisation of strong monobasic acid with strong monoacidic base is always –57 kJ mol^–1
Reason (R): Enthalpy of neutralisation is the amount of heat liberated when one mole of H⁺ ions furnished by acid combine with one mole of ^–OH ions furnished by base to form one mole of water. In the light of the above statements.
Choose the correct answer from the options given below.

• A. (A) is true but (R) is false
• B. Both (A) and (R) are true and (R) is the correct explanation of (A)
• C. (A) is false but (R) is true
• D. Both (A) and (R) are true but (R) is not the correct explanation of (A)

Answer 1

The Correct Option is B

Enthalpy of neutralisation of a strong acid (SA) and strong base (SB) is always −57 kJ/mol because a strong monoacid gives one mole of H⁺ and a strong mono-base gives one mole of OH⁻, which combine to form one mole of water. Both the assertion and reason are true, and (R) correctly explains (A).